[linux-lvm] How to extend a root LVM volume?

Heinz Mauelshagen mauelshagen at redhat.com
Sun Jun 20 08:50:37 UTC 2004

I am guessing that rescue CD has a restrictive filter setup
which prevents vgscan from seeing the drives.

On Thu, Jun 17, 2004 at 10:04:06AM -0700, Mark Miksis wrote:
> I'm trying to extend a root LVM.  I'm using LVM2 on FC2.  Here is what 
> I've tried:
> I ran lvextend when the system was booted normally and the volumes were 
> mounted.  This worked as expected and lvdisplay properly shows the new 
> larger size.
> Then I booted into the FC2 rescue CD and instructed it to NOT search for 
> and mount Fedora installations.  I then ran:
> # resize2fs /dev/Volume00/LogVol00
> I don't have the specific error, but it basically says that the 
> specified volume doesn't exist.  Indeed if I look in /dev, my volume 
> group and volumes are nowhere to be found.
> At that point I tried:
> # lvm
> lvm> vgscan
> After only about 1 second, it responds that no volumes are found.
> I also tried rebooting from the CD and letting it mount my 
> installations.  In this case, the volume and volume groups are properly 
> discovered and mounted.  However, if I try to unmount the volume, it 
> always responds with "device busy".
> Is this a problem with how the FC2 rescue disk scans for volumes?  Any 
> help would be appreciated.
> _______________________________________________
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/


Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***


Heinz Mauelshagen                                 Red Hat GmbH
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